Battery Life - Omron BU150R Instruction Manual

10-3 Battery life

■Battery life
Periodic checks of the lead battery used in the battery unit are required due to the battery
limited lifespan. For the battery checking method, refer to "4-1 Checking the battery"
( P.61 ). Battery replacement is recommended before the battery is expired.
Battery life
(The following is expressed based on the battery's trickle life, the service life of a battery
under the condition where low-frequent (once or twice a month) rechargings and
dischargings are performed.)
Battery
type
Long-life
battery
* Basically, the ambient temperature have a high influence on the battery life.
■The periodic recharges are required even if the battery is stored.
The battery self-discharges even if the UPS is not used (i.e., leaving the battery not
charged), and it deteriorates the battery. In the worst case, the battery may become
unusable.
Example of the storing condition and recharging frequencies
100
When the battery is stored at the storage temperature of 25°C, the battery self-discharges
(and the battery level lowers) to approximately 80% over half a year, and to approximately
50% over a year.
Higher the storage temperature is, faster the battery will self-discharge.
Storage temperature
40°C or less
30°C or less
25°C or less
BU150R
Expected battery life
(Ambient
temperature 40°C)
1.7 years
80
60
40°C
40
20
0
0 3 6
Storage period (Month)
Auxiliary charging interval
2 months
4 months
6 months
Expected battery life
(Ambient temperature
30°C)
3.5 years
Recharge line
30°C 25°C
9 12
10 References
10-3 Battery life
Expected battery life
(Ambient
temperature 25°C)
5 years
15
10
105